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WO2009142004A1 - Système de chauffage - Google Patents

Système de chauffage Download PDF

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Publication number
WO2009142004A1
WO2009142004A1 PCT/JP2009/002210 JP2009002210W WO2009142004A1 WO 2009142004 A1 WO2009142004 A1 WO 2009142004A1 JP 2009002210 W JP2009002210 W JP 2009002210W WO 2009142004 A1 WO2009142004 A1 WO 2009142004A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
heat exchanger
storage tank
side heat
medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/002210
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English (en)
Japanese (ja)
Inventor
谷本啓介
川端克宏
浅井英明
川添政宣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of WO2009142004A1 publication Critical patent/WO2009142004A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units

Definitions

  • the present invention relates to a heating system using a refrigerant circuit for performing a refrigeration cycle as a heat source.
  • a heating system using a refrigerant circuit for performing a refrigeration cycle as a heat source is known.
  • room heating is performed using heat released by a heat medium heated by the refrigerant circulating in the refrigerant circuit.
  • Patent Document 1 discloses a floor heating apparatus that performs floor heating as this type of heating system.
  • a hot water heat exchanger is provided in the refrigerant circuit.
  • a secondary circuit in which water circulates is connected to the hot water heat exchanger.
  • a floor heating panel is provided in the secondary circuit.
  • the hot water heat exchanger the refrigerant dissipates heat, and the water circulating in the secondary circuit is heated.
  • the hot water heated by the hot water heat exchanger radiates heat from the floor heating panel.
  • the indoor water is heated by the heat of the hot water heated by the refrigerant in the refrigerant circuit being radiated by the floor heating panel.
  • the inverter of the compressor of the refrigerant circuit is controlled so that the temperature of the hot water returning from the floor heating panel to the hot water heat exchanger becomes the target temperature.
  • the operating capacity of the compressor is controlled according to the temperature of the hot water returning from the floor heating panel to the hot water heat exchanger.
  • the temperature of the warm water returning to the warm water heat exchanger decreases as the heating load increases. That is, in the conventional heating system, the circulation amount of the refrigerant in the refrigerant circuit is adjusted according to the heating load.
  • the amount of heat obtained by the refrigeration cycle in the refrigerant circuit is determined by the amount of refrigerant circulating in the refrigerant circuit.
  • the coefficient of performance (COP) of the refrigeration cycle also changes accordingly. The reason is that the performance of the heat exchanger changes when the flow rate of the refrigerant passing through the heat exchanger changes, or the efficiency of the compressor changes when the rotation speed of the compressor changes.
  • the heating capacity is adjusted only by changing the amount of heat obtained by the refrigeration cycle as in the conventional heating system
  • the fluctuation range of the circulation amount of the refrigerant in the refrigerant circuit becomes large.
  • the amount of time that the circulation amount of the refrigerant in the refrigerant circuit has to be set to such a value that a high coefficient of performance cannot be obtained becomes long, and the operating efficiency of the heating system is reduced. There was a fear.
  • the present invention has been made in view of this point, and an object of the present invention is to provide a heating system that heats a room using heat released from a heat medium of a heat transfer circuit heated by a refrigerant in a refrigerant circuit. It is to improve the driving efficiency.
  • the first invention performs a refrigeration cycle by circulating a refrigerant between a heat transfer circuit (30) for circulating a heat medium between a heat source side heat exchanger (23) and a utilization side heat exchanger (35),
  • a refrigerant circuit (21) that is connected to a heat source side heat exchanger (23) and heats the heat medium of the heat transfer circuit (30) with a refrigerant, and the heat medium is released by the use side heat exchanger (35) It is intended for a heating system that heats the room using heat.
  • the heat transfer circuit (30) of the heating system includes a heat storage tank (37) for storing the heat medium heated by the heat source side heat exchanger (23), and the heat source side heat exchanger (23).
  • a heat storage tank (37) for storing the heat medium heated by the heat source side heat exchanger (23), and the heat source side heat exchanger (23).
  • Storage operation to supply both the heat storage tank (37) and the heat source side heat exchanger (23) and both the heat medium heated by the heat source side heat exchanger (23) and the heat medium in the heat storage tank (37)
  • the normal operation, the heat storage operation, and the use operation are selectively performed.
  • normal operation only the heat medium heated by the heat source side heat exchanger (23) is supplied to the use side heat exchanger (35) without using the heat storage tank (37).
  • the heat medium heated by the heat source side heat exchanger (23) is supplied to both the use side heat exchanger (35) and the heat storage tank (37).
  • the heat storage operation since a part of the heat medium heated by the heat source side heat exchanger (23) is supplied to the heat storage tank (37), the amount of heat of the heat medium supplied to the use side heat exchanger (35) is reduced. The heating capacity in the use side heat exchanger (35) is reduced.
  • both the heat medium heated by the heat source side heat exchanger (23) and the heat medium in the heat storage tank (37) are supplied to the use side heat exchanger (35).
  • the heat medium is also supplied from the heat storage tank (37) to the use side heat exchanger (35), so the amount of heat of the heat medium supplied to the use side heat exchanger (35) increases, The heating capacity in the side heat exchanger (35) is increased.
  • the amount of heat of the heat medium supplied to the use side heat exchanger (35) is adjusted by the heat storage tank (37), thereby adjusting the circulation amount of the refrigerant in the refrigerant circuit (21). Even if it does not, the heating capability in the use side heat exchanger (35) is adjusted.
  • the heat transfer circuit (30) in the heat transfer circuit (30), the heat medium that has passed through the use side heat exchanger (35), or the way through the use side heat exchanger (35).
  • the normal operation is performed.
  • the control means (50) for setting the operation of the heat transfer circuit (30) for the heat storage operation, and for the use operation when the temperature of the heat medium falls below the lower limit of the predetermined numerical range.
  • the control means (50) is a heat medium that has passed through the use side heat exchanger (35) in the heat transfer circuit (30), or heat that is in the process of passing through the use side heat exchanger (35). Detect the temperature of the medium.
  • the control means (50) causes the heat transfer circuit (30) to perform a normal operation when the detected temperature of the heat medium is a value within a predetermined numerical range.
  • the control means (50) when the detected temperature of the heat medium exceeds the upper limit of the predetermined numerical range, that is, the heating load is relatively low, and the temperature of the heat medium is lowered so much in the use side heat exchanger (35). If not, the heat transfer circuit (30) is caused to perform a heat storage operation.
  • control means (50) is configured such that when the detected temperature of the heat medium falls below a lower limit of the predetermined numerical range, that is, the heating load is relatively high and the temperature of the heat medium is relatively high in the use side heat exchanger (35). In the case of a significant decrease, the utilization operation is performed by the heat transfer circuit (30). In this second invention, the operation of the heat transfer circuit (30) using the temperature of the heat medium that has passed through the use side heat exchanger (35) or the heat medium that is in the process of passing through the use side heat exchanger (35). Therefore, the operation of the heat transfer circuit (30) is switched according to the heating load.
  • the compressor (22) for circulating the refrigerant is constituted by a compressor having a fixed operating capacity.
  • a compressor having a fixed operating capacity is used as the compressor (22) of the refrigerant circuit (21).
  • the compressor (22) continuously operates while a heat medium is circulating in the heat transfer circuit (30).
  • the compressor (22) continuously operates while the heat medium is circulating in the heat transfer circuit (30).
  • heat is continuously supplied from the refrigerant circuit (21) to the heat transfer circuit (30).
  • the heat transfer circuit (30) causes the heat medium flowing out from a lower portion of the heat storage tank (37) during the heat storage operation. It joins the heat medium from the use side heat exchanger (35) to the heat source side heat exchanger (23) and is sent to the heat source side heat exchanger (23). A part of the heat medium directed from the heat exchanger (35) to the heat source side heat exchanger (23) flows into the lower part of the heat storage tank (37).
  • the heat medium heated by the heat source side heat exchanger (23) flows into the heat storage tank (37), and from the lower part of the heat storage tank (37), the heat source side
  • the heat medium sent to the heat exchanger (23) flows out.
  • a part of the heat medium from the use side heat exchanger (35) to the heat source side heat exchanger (23) flows into the lower part of the heat storage tank (37), and the heat storage tank (37)
  • the heat medium to be supplied to the use side heat exchanger (35) flows out.
  • the heat medium flows out from the lower part as the heated heat medium flows in, and is supplied to the use side heat exchanger (35) in the heat storage dunk during the use operation. As the heat medium flows out, the heat medium flows in from the lower part.
  • the heat transfer circuit (30) is supplied with a heat medium flowing from the use side heat exchanger (35) toward the heat source side heat exchanger (23).
  • a pump (36) disposed in the passage (31b), a use side heat exchanger (35) in the return passage (31b), the pump (36), and a lower part of the heat storage tank (37) are communicated with each other.
  • the heat medium in the heat storage tank (37) is sucked into the pump (36) through the first communication passage (62a), and in the use operation, Part of the heat medium discharged from the pump (36) is sent to the heat storage tank (37) through the second communication passage (62b). It is done.
  • the lower part of the heat storage tank (37) communicates between the use side heat exchanger (35) and the pump (36) through the first communication passage (62a). That is, the lower part of the heat storage tank (37) communicates with the suction side of the pump (36). For this reason, during the heat storage operation, the heat medium can be discharged from the lower part of the heat storage tank (37) by the pump (36).
  • the lower part of the heat storage tank (37) communicates between the pump (36) and the heat source side heat exchanger (23) through the second communication passage (62b). That is, the lower part of the heat storage tank (37) communicates with the discharge side of the pump (36).
  • the heat medium can be sent to the lower part of the heat storage tank (37) by the pump (36).
  • any of the normal operation, the heat storage operation, and the utilization operation can be executed only by the pump (36) in the return passage (31b).
  • the pump (36) is configured such that the discharge flow rate is variable, while the heat transfer circuit (30) is configured to perform the use operation compared to the normal operation. However, the discharge flow rate of the pump (36) is set so that the discharge flow rate increases.
  • the discharge flow rate of the pump (36) is set so that the discharge flow rate is higher in the use operation than in the normal operation. For this reason, the flow rate of the heat medium supplied to the use side heat exchanger (35) is larger in the use operation than in the normal operation.
  • the heat transfer circuit (30) is returned to the heat transfer circuit (30) through which the heat medium from the use side heat exchanger (35) to the heat source side heat exchanger (23) flows.
  • the main pump (36) disposed in the passage (31b), the return passage (31b), and the communication passage (62) that communicates with the lower part of the heat storage tank (37) are disposed.
  • a sub pump (39) is provided that sends a part of the heat medium from the use side heat exchanger (35) to the heat source side heat exchanger (23) to the lower part of the heat storage tank (37).
  • the sub-pump (in order to send a part of the heat medium from the use side heat exchanger (35) to the heat source side heat exchanger (23) to the lower part of the heat storage tank (37) during the use operation. 39) is used.
  • the flow rate of the heat medium sent to the lower part of the heat storage tank (37) during the use operation is determined by the discharge flow rate of the sub pump (39).
  • a ninth invention provides the indoor heat exchanger (75) disposed on the back side of the room or a partition member partitioning the room in any one of the first to eighth inventions,
  • An indoor side circuit (80) connected to the use side heat exchanger (35) and radiating heat from the indoor heat exchanger (75) by the heat medium heated by the use side heat exchanger (35) is provided.
  • the indoor side circuit (80) is connected to the use side heat exchanger (35) of the heat transfer circuit (30).
  • the indoor side circuit (80) is provided with an indoor heat exchanger (75) that is disposed in the room or on the back side of a component that partitions the room (for example, the back side of the floor material).
  • the heat medium heated by the use side heat exchanger (35) dissipates heat in the indoor heat exchanger (75).
  • the room is heated by the heat released by the indoor heat exchanger (75).
  • the amount of heat of the heat medium supplied to the use-side heat exchanger (35) can be adjusted by the heat storage tank (37), so even if the amount of refrigerant circulation in the refrigerant circuit (21) is not adjusted, It is possible to adjust the heating capacity in the use side heat exchanger (35).
  • the heating capacity in the use side heat exchanger (35) can be adjusted even if the amount of heat obtained by the refrigeration cycle is constant. For this reason, the fluctuation range of the circulation amount of the refrigerant in the refrigerant circuit (21) is smaller than in the case where the heating capacity is adjusted only by the refrigeration cycle. Accordingly, since the time for which the amount of refrigerant circulating in the refrigerant circuit (21) has to be set to such a value that a high coefficient of performance cannot be obtained can be shortened, the operating efficiency of the heating system can be improved. .
  • a normal operation is performed in which the heat medium heated by the heat source side heat exchanger (23) does not pass through the heat storage tank (37).
  • the heat storage tank (37) is disposed in the passage through which the heat medium flows from the heat source side heat exchanger (23) to the use side heat exchanger (35)
  • the heat source side heat exchanger The heat medium heated in 23
  • a normal operation is performed in which the heat medium heated by the heat source side heat exchanger (23) does not pass through the heat storage tank (37).
  • the heat medium heated by the heat source side heat exchanger (23) is used side heat.
  • the time to reach the exchanger (35) is shortened. Therefore, since the heat loss of the heat medium heated by the heat source side heat exchanger (23) can be reduced, the operating efficiency of the heating system can be improved.
  • a heat transfer circuit (30) using the temperature of the heat medium which passed the utilization side heat exchanger (35), or the heat medium in the middle of passing the utilization side heat exchanger (35) Therefore, the operation of the heat transfer circuit (30) is switched according to the heating load. Therefore, the heating capacity of the use side heat exchanger (35) can be appropriately adjusted according to the heating load.
  • a compressor having a fixed operating capacity is used as the compressor (22) of the refrigerant circuit (21). For this reason, by designing the refrigerant circuit (21) so that the coefficient of performance in the operating capacity of the compressor (22) is high, it is possible to operate in a state where the coefficient of performance is always high. Therefore, the operating efficiency of the heating system can be improved.
  • the use operation increases the flow rate of the heat medium supplied to the use side heat exchanger (35) as compared to the normal operation. I have to. Therefore, the heating capacity in the use side heat exchanger (35) can be efficiently increased in the use operation.
  • the flow rate of the heat medium sent to the lower part of the heat storage tank (37) during the use operation is determined by the discharge flow rate of the sub pump (39).
  • the heat medium supplied to the use side heat exchanger (35) is pushed out by the heat medium sent to the lower part. Therefore, the flow rate of the heat medium supplied from the heat storage tank (37) to the use side heat exchanger (35) during the use operation is determined by the discharge flow rate of the sub pump (39). Therefore, the flow rate of the heat medium supplied from the heat storage tank (37) to the use side heat exchanger (35) during the use operation can be easily set to a desired flow rate.
  • FIG. 1 is a schematic configuration diagram of a heating system according to the first embodiment.
  • FIG. 2 is a chart showing the relationship between the operation of the heat transfer circuit and the heating load in the heating system according to the first embodiment.
  • FIG. 3 is a schematic configuration diagram illustrating the flow of water in the heat transfer circuit during normal operation of the heating system according to the first embodiment.
  • FIG. 4 is a schematic configuration diagram illustrating the flow of water in the heat transfer circuit during the heat storage operation of the heating system according to the first embodiment.
  • FIG. 5 is a schematic configuration diagram illustrating the flow of water in the heat transfer circuit during the use operation of the heating system according to the first embodiment.
  • FIG. 6 is a schematic configuration diagram of a heating and hot water supply system according to the second embodiment.
  • FIG. 1 is a schematic configuration diagram of a heating system according to the first embodiment.
  • FIG. 2 is a chart showing the relationship between the operation of the heat transfer circuit and the heating load in the heating system according to the first embodiment.
  • FIG. 3 is a schematic configuration
  • FIG. 7 is a schematic configuration diagram illustrating the flow of water in the heat transfer circuit and the water supply circuit during normal operation of the heating and hot water supply system according to the second embodiment.
  • FIG. 8 is a schematic configuration diagram illustrating the flow of water in the heat transfer circuit and the water supply circuit during the heat storage operation of the heating and hot water supply system according to the second embodiment.
  • FIG. 9 is a schematic configuration diagram illustrating the flow of water in the heat transfer circuit and the water supply circuit during the use operation of the heating and hot water supply system according to the second embodiment.
  • Drawing 10 is a schematic structure figure of the heating system concerning the 1st modification of other embodiments.
  • FIG. 11 is a schematic block diagram of the heating system which concerns on the 2nd modification of other embodiment.
  • Embodiment 1 of the Invention A first embodiment of the present invention will be described.
  • the first embodiment is a heating system (10) according to the present invention.
  • the heating system (10) heats the heat medium of the heat transfer circuit (30) using the heat pump heat source unit (20) as a heat source, and heats the room using the heat released by the heat medium. It is configured.
  • the refrigerant circuit (21) of the heat source unit (20) is a primary circuit
  • the heat transfer circuit (30) is a secondary circuit.
  • This heating system (10) is installed in a general household in a cold region, for example.
  • a heat source side heat exchanger (23) and a plurality of usage side heat exchangers (35, 35, 35) are connected to the heat transfer circuit (30).
  • the plurality of usage side heat exchangers (35) are connected in parallel to each other between the supply side header (33) and the return side header (34).
  • water as a heat medium circulates between the heat source side heat exchanger (23) and the plurality of usage side heat exchangers (35).
  • the heat source side heat exchanger (23) includes a first passage (23a) to which a refrigerant circuit (21) described later is connected and a second passage (23b) to which the heat transfer circuit (30) is connected. .
  • the heat source side heat exchanger (23) is configured such that heat is exchanged between the refrigerant in the first passage (23a) and the water in the second passage (23b).
  • the heat source side heat exchanger (23) is configured by, for example, a plate heat exchanger.
  • the use side heat exchanger (35) is configured as a floor heating radiator installed on the back side of the floor material or a radiator installed in the indoor space.
  • each usage side heat exchanger A passage from the outlet of the vessel (35) to the inlet of the second passage (23b) constitutes a return passage (31b).
  • an openable first on-off valve (41) is provided between the heat source side heat exchanger (23) and the supply side header (33).
  • a pump (36) having a variable operating capacity is provided between the return header (34) and the heat source side heat exchanger (23).
  • An expansion tank (38) for releasing the pressure of the heat transfer circuit (30) is connected to the suction side of the pump (36) in the return passage (31b).
  • the heat transfer circuit (30) of the first embodiment is provided with a heat storage tank (37) for storing hot water heated by the heat source side heat exchanger (23).
  • a heat storage tank (37) for storing hot water heated by the heat source side heat exchanger (23).
  • the water is full, and the temperature of the water is higher in the upper part.
  • Connected to the top of the heat storage tank (37) are a hot water inlet passage (61) for flowing warm water into the heat storage tank (37) and a hot water outlet passage (64) for discharging hot water from the heat storage tank (37). ing.
  • the hot water passage (61) branches from between the heat source side heat exchanger (23) and the first on-off valve (41) in the supply passage (31a).
  • the hot water passage (61) is provided with a second on-off valve (42) that can be freely opened and closed.
  • the hot water passage (64) merges between the first on-off valve (41) and the supply side header (33) in the supply passage (31a).
  • the hot water passage (64) is provided with a fifth open / close valve (45) that can be freely opened and closed.
  • the first communication passage (62a) is connected between the return header (34) and the pump (36) in the return passage (31b) of the first embodiment, and the pump (36) and the heat source side heat exchanger are connected.
  • the second communication passage (62b) is connected between (23).
  • the first communication passage (62a) and the second communication passage (62b) are joined at a joining passage (63) connected to the bottom surface of the heat storage tank (37) on the opposite side to the return passage (31b).
  • the first communication passage (62a) connects the lower part of the heat storage tank (37) to the suction side of the pump (36).
  • a fourth open / close valve (44) that can be freely opened and closed is provided in the first communication passage (62a).
  • the second communication passage (62b) connects the lower part of the heat storage tank (37) to the discharge side of the pump (36).
  • a third open / close valve (43) that can be freely opened and closed is provided in the second communication passage (62b).
  • only the hot water heated by the heat source side heat exchanger (23) is controlled by controlling the first to fifth on-off valves (41 to 45).
  • Normal operation of supplying to the exchanger (35), heat storage operation of supplying hot water heated by the heat source side heat exchanger (23) to both the use side heat exchanger (35) and the heat storage tank (37), Any one of the three types of usage operations of supplying both the hot water heated by the heat source side heat exchanger (23) and the hot water in the heat storage tank (37) to each usage side heat exchanger (35) is performed. Is called. Details of each operation will be described later.
  • the heat source unit (20) accommodates a refrigerant circuit (21) filled with a refrigerant.
  • the refrigerant circuit (21) is filled with a fluorocarbon refrigerant.
  • carbon dioxide may be used instead of the fluorocarbon refrigerant.
  • a compressor (22), a heat source side heat exchanger (23), a pressure reducing mechanism (24), and an outdoor heat exchanger (25) are sequentially connected to the refrigerant circuit (21).
  • the compressor (22) is configured as a compressor with a fixed operating capacity.
  • the compressor (22) is one in which the electric motor is always operated at a constant rotational speed, and its operating capacity is fixed.
  • the compressor (22) continuously operates without stopping during the operation of the heating system (10). That is, the compressor (22) performs continuous operation without stopping while water is circulating in the heat transfer circuit (30).
  • the first passage (23a) is connected to the refrigerant circuit (21).
  • the decompression mechanism (24) is configured as an electronic expansion valve with a variable opening.
  • the outdoor heat exchanger (25) is configured as a cross fin type fin-and-tube heat exchanger.
  • An outdoor fan (26) for sending air to the outdoor heat exchanger (25) is provided in the vicinity of the outdoor heat exchanger (25).
  • the heating system (10) of the first embodiment is provided with a controller (50) that controls the operating state of the heating system (10).
  • the controller (50) constitutes a control means (55).
  • Controller (50) controls the operation of the heat transfer circuit (30) based on the measured value of the outlet temperature sensor (16). Specifically, the controller (50) selects an operation to be executed from the normal operation, the heat storage operation, and the use operation based on the measured value of the outlet temperature sensor (16), and executes the selected operation to the heat transfer circuit (30). It is configured to let you.
  • the controller (50) receives the measured value (To) of the outlet temperature sensor (16) and the indoor set temperature (Ts).
  • the controller (50) is preset with a first determination value (T1) and a second determination value (T2) for selecting the operation of the heat transfer circuit (30).
  • the first determination value (T1) is a positive value.
  • the second determination value (T2) is a negative value, and the absolute value is equal to the first determination value (T1).
  • the controller (50) determines the difference (To ⁇ Ts) between the measured value (To) of the outlet temperature sensor (16) and the indoor set temperature (Ts) as a first determination value (T1) and a second determination value (T2). ) To select the operation to be performed. Specifically, the controller (50) determines that the temperature of water that has passed through each use-side heat exchanger (35) is within a predetermined numerical range (T2 + Ts or more and T1 + Ts or less) when Equation 1 below is satisfied. When it is determined that the value is the normal value, the normal operation is selected. The normal operation is selected when the indoor heating load is not so high or low as shown in FIG.
  • the controller When the controller (50) selects normal operation, the controller opens the first on-off valve (41), opens the second on-off valve (42), the third on-off valve (43), the fourth on-off valve (44), and By setting the fifth on-off valve (45) to the closed state, the heat transfer circuit (30) is caused to perform a normal operation.
  • the controller (50) determines that the following expression 2 is satisfied, that is, the temperature of the water that has passed through each use side heat exchanger (35) exceeds the upper limit value (T1 + Ts) within a predetermined numerical range. If so, the heat storage operation is selected. The heat storage operation is selected when the indoor heating load is relatively low and the temperature of the hot water does not decrease so much in each use side heat exchanger (35).
  • the controller selects the heat storage operation
  • the controller opens the first on-off valve (41), the second on-off valve (42), and the fourth on-off valve (44), and opens the third on-off valve (43) and By setting the fifth on-off valve (45) to a closed state, the heat transfer circuit (30) is caused to perform a heat storage operation. Further, the controller (50) maintains the discharge flow rate of the pump (36) in a normal operation.
  • the controller (50) determines that the following Equation 3 is satisfied, that is, the temperature of the water that has passed through each use side heat exchanger (35) is below the lower limit (T2 + Ts) within a predetermined numerical range. In such a case, the use operation is selected. The use operation is selected when the indoor heating load is relatively high and the temperature of the hot water is relatively reduced in each use-side heat exchanger (35).
  • the controller (50) selects the use operation
  • the controller (50) sets the first on-off valve (41), the third on-off valve (43), and the fifth on-off valve (45) to the open state, and the second on-off valve (42) and By setting the fourth on-off valve (44) to the closed state, the heat transfer circuit (30) is caused to perform the use operation.
  • the controller (50) sets the discharge flow rate of the pump (36) to a value larger than that in the normal operation.
  • the refrigerant circuit (21) In the refrigerant circuit (21), the refrigerant discharged from the compressor (22) circulates, whereby the heat source side heat exchanger (23) operates as a radiator (condenser), and the outdoor heat exchanger (25) A refrigeration cycle that operates as a heat absorber is performed. In this refrigeration cycle, the opening degree of the decompression mechanism (24) is adjusted as appropriate.
  • the refrigerant discharged from the compressor (22) dissipates heat into the water in the second passage (23b) and condenses in the first passage (23a) of the heat source side heat exchanger (23).
  • the refrigerant condensed in the heat source side heat exchanger (23) is depressurized by the decompression mechanism (24), absorbs heat from the air sent by the outdoor fan (26) in the outdoor heat exchanger (25), and evaporates.
  • the refrigerant evaporated in the outdoor heat exchanger (25) returns to the compressor (22), is compressed, and is discharged again.
  • the operation of the refrigerant circuit (21) is the same regardless of the type of operation of the heat transfer circuit (30).
  • heat transfer circuit (30) water circulates between the heat source side heat exchanger (23) and each use side heat exchanger (35), so that the heat of the refrigerant in the refrigerant circuit (21) is transferred to the heat transfer circuit ( 30) is transmitted to the room through water and the room is heated.
  • the point that water circulates between the heat source side heat exchanger (23) and each use side heat exchanger (35) is the same in the heat storage operation and the use operation described later.
  • the heat transfer circuit (30) since the fourth on-off valve (44) is in the open state, the water below the heat storage tank (37) is drawn into the pump (36) through the first communication passage (62a). Out of the heat storage tank (37). The water that has flowed out of the heat storage tank (37) merges with the water that has passed through each use side heat exchanger (35), and is sent to the heat source side heat exchanger (23).
  • the second on-off valve (42) since the second on-off valve (42) is in an open state, a part of the hot water flowing through the supply passage (31a) passes through the hot water passage (61). Flow into. Hot water having the same flow rate as that flowing out of the first communication passage (62a) flows into the heat storage tank (37). In the heat storage tank (37), the high temperature water heated by the heat source side heat exchanger (23) flows in and the lower temperature low temperature water flows out, so the amount of hot water increases.
  • the hot water in the upper layer of the heat storage tank (37) flows out through the hot water outlet passage (64).
  • the hot water flowing out from the heat storage tank (37) joins the hot water heated by the heat source side heat exchanger (23) and is supplied to each use side heat exchanger (35).
  • the third on-off valve (43) since the third on-off valve (43) is open, a part of the water discharged from the pump (36) is stored in the heat storage tank through the second communication passage (62b). (37). Water having the same flow rate as that flowing out from the hot water passage (64) flows into the heat storage tank (37).
  • the heat storage tank (37) the high-temperature water in the upper layer flows out and the relatively low-temperature water after heat dissipation flows in, so the amount of hot water decreases.
  • hot water is supplied not only from the heat source side heat exchanger (23) but also from the heat storage tank (37) to each use side heat exchanger (35), so it is supplied to each use side heat exchanger (35).
  • the flow rate of the hot water is increased compared to the normal operation. Therefore, the amount of heat of the hot water supplied to each use side heat exchanger (35) is larger than that in the normal operation, so that the heating capacity in each use side heat exchanger (35) is higher than that in the normal operation.
  • the amount of heat of the heat medium supplied to the use side heat exchanger (35) can be adjusted by the heat storage tank (37), so the amount of refrigerant circulation in the refrigerant circuit (21) need not be adjusted.
  • the heating capacity in the use side heat exchanger (35) can be adjusted even if the amount of heat obtained by the refrigeration cycle is constant. For this reason, the fluctuation range of the circulation amount of the refrigerant in the refrigerant circuit (21) is smaller than in the case where the heating capacity is adjusted only by the refrigeration cycle. Accordingly, since the time for which the amount of refrigerant circulating in the refrigerant circuit (21) has to be set to such a value that a high coefficient of performance cannot be obtained can be shortened, the operating efficiency of the heating system can be improved. .
  • the heat storage tank (37) is arrange
  • a compressor having a fixed operating capacity is used as the compressor (22) of the refrigerant circuit (21). For this reason, by designing the refrigerant circuit (21) so that the coefficient of performance in the operating capacity of the compressor (22) is high, it is possible to operate in a state where the coefficient of performance is always high. Therefore, the operating efficiency of the heating system can be improved.
  • Embodiment 1 heat is continuously supplied from the refrigerant circuit (21) to the heat transfer circuit (30) while the heat medium is circulating in the heat transfer circuit (30). For this reason, it is possible to make the output calorie
  • the first embodiment also includes a first communication passage (62a) for communicating the lower part of the heat storage tank (37) with the suction side of the pump (36), and a lower part of the heat storage tank (37) with the discharge side of the pump (36). Since the second communication passage (62b) that communicates with each other is provided, it is possible to perform any of the normal operation, the heat storage operation, and the use operation only by the pump (36) of the return passage (31b). . For this reason, since it can avoid providing a pump (36) separately for heat storage operation
  • the usage operation increases the flow rate of hot water supplied to the usage-side heat exchanger (35) compared to the normal operation. Yes. Therefore, the heating capacity in the use side heat exchanger (35) can be efficiently increased in the use operation.
  • Embodiment 2 of the Invention is a heating hot-water supply system (11) provided with the heating system (10) which concerns on this invention. Below, a different point from the said Embodiment 1 is demonstrated.
  • the indoor side circuit (80) through which the heat medium that exchanges heat with water in the heat transfer circuit (30) circulates is connected to the use side heat exchanger (35). Yes.
  • the indoor circuit (80) is a tertiary circuit.
  • the number of use side heat exchangers (35) is one.
  • the heat exchanger installed indoors is provided in the indoor circuit (80), it is not necessary to arrange the heat transfer circuit (30) indoors. Therefore, it is possible to incorporate the refrigerant circuit (21) and the heat transfer circuit (30) into one outdoor unit.
  • the indoor circuit (80) is provided with a plurality of indoor heat exchangers (75).
  • the plurality of indoor heat exchangers (75) are connected in parallel to each other between the headers (73, 74).
  • the indoor heat exchanger (75) is configured as a radiator for floor heating installed on the back side of a floor material, which is a partition member that divides the room, or as a radiator installed in an indoor space.
  • the indoor circuit (80) is provided with an indoor pump (76) having a constant discharge flow rate between the return side header (74) and the use side heat exchanger (35).
  • An expansion tank (78) for releasing the pressure of the indoor circuit (80) is connected to the suction side of the indoor pump (76).
  • the indoor pump (76) may be configured so that the discharge flow rate is variable.
  • a water supply circuit (70) is connected to the heat transfer circuit (30).
  • the water supply circuit (70) has a city water side passage (51) for supplying city water to the heat transfer circuit (30), and a use side passage extending to the use side such as a bath tub and shower or kitchen faucet. (52).
  • the exit end of the city water side passageway (51) is connected to the junction passageway (63).
  • the inlet end of the use side passageway (52) is connected to the hot water supply passageway (64).
  • the use side passageway (52) is provided with a mixing valve (55).
  • a branch passage (53) branched from the city water side passage (51) is connected to the mixing valve (55).
  • the mixing valve (55) is configured to be able to adjust the flow rate ratio between the warm water flowing through the use side passage (52) and the water flowing from the branch passage (53) according to the water temperature required on the use side. .
  • the city water side passageway (51) is provided with a check valve (58) that allows only the flow of water toward the heat storage tank (37).
  • An escape passage (57) for releasing the pressure of the heat storage tank (37) is connected to the top of the heat storage tank (37).
  • a relief valve (56) is provided in the relief passage (57).
  • the heat storage tank (37) has a part of the water discharged from the pump (36) through the junction passage (63) and the city. Water supplied from the water-side passage (51) flows in. Hot water flows out from the heat storage tank (37) through the hot water passage (64). The high-temperature water flowing out of the heat storage tank (37) branches into the supply passage (31a) side and the use side passage (52).
  • the heat transfer circuit (30) is provided with two pumps of a main pump (36) and a sub pump (39).
  • the main pump (36) is disposed in the return passage (31b).
  • the sub pump (39) is disposed in the second communication passage (62b).
  • the return passage (31b) side of the second communication passage (62b) is connected to the suction side of the main pump (36).
  • the controller (50) operates the sub pump (39) only during the use operation.
  • the auxiliary pump (39) sends a part of the water flowing through the return passage (31b) to the lower part of the heat storage tank (37) during the use operation, Let it flow through the hot water passage (64).
  • the discharge flow rate of the main pump (36) during the use operation is the same as the normal operation value, unlike the above embodiment. That is, the discharge flow rate of the main pump (36) is always constant. For this reason, a pump with a fixed discharge flow rate can be used for the main pump (36).
  • the flow rate of water sent to the lower part of the heat storage tank (37) during the use operation is determined by the discharge flow rate of the sub pump (39).
  • the hot water supplied to the use side heat exchanger (35) is pushed out by the water sent to the lower part. Therefore, since the flow rate of the hot water supplied from the heat storage tank (37) to the use side heat exchanger (35) during the use operation is determined by the discharge flow rate of the sub pump (39), The flow rate of the hot water supplied from the tank (37) to the use side heat exchanger (35) can be easily set to a desired flow rate.
  • cooling heat exchangers (67, 67) are provided in the return passage (31b) of the heat transfer circuit (30).
  • a plurality of cooling heat exchangers (67, 67) are provided, and are connected in parallel between the headers (68, 69).
  • Each cooling heat exchanger (67) is accommodated in an indoor unit installed in the room (not shown).
  • Each indoor unit is provided with an indoor fan (66) that sends air to the cooling heat exchanger (67).
  • each use side heat exchanger (35) is further cooled by exchanging heat with the air sent by the indoor fan (66) in each cooling heat exchanger (67).
  • the air heated by each cooling heat exchanger (67) is supplied indoors.
  • the temperature of the water returning to the heat source side heat exchanger (23) is lower than that when there is no cooling heat exchanger (67).
  • the heat source side heat exchanger (23) is used by using the heat of the water which passed each utilization side heat exchanger (35) with each heat exchanger for cooling (67).
  • the temperature of the water returning to (2) is lowered, and the temperature of the refrigerant radiated by the heat source side heat exchanger (23) is also lowered (for example, about 20 ° C.). That is, the amount of heat of the refrigerant that can be used as warm heat increases.
  • the energy required to compress the refrigerant in the compressor (22) does not increase. Therefore, it is possible to obtain a high coefficient of performance in the refrigerant circuit (21) by providing the cooling heat exchanger (67).
  • the controller (50) selects the operation of the heat transfer circuit (30) using the temperature of the heat medium that has passed through the use side heat exchanger (35), but the use side heat exchanger ( The operation of the heat transfer circuit (30) may be selected using the temperature of the heat medium in the course of passing through 35).
  • the outlet temperature sensor (16) can be arranged on the outlet side of the use side heat exchanger (35).
  • the heat medium circulating in the heat transfer circuit (30) may be a liquid other than water.
  • the present invention is useful for a heating system using a refrigerant circuit that performs a refrigeration cycle as a heat source.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention concerne un réservoir de stockage de chaleur (37) pour stocker un milieu de chaleur chauffé par un échangeur de chaleur côté source de chaleur (23) dans un circuit de transfert de chaleur (30) qui fait circuler le milieu de chaleur entre l'échangeur de chaleur côté source de chaleur (23) et un échangeur de chaleur côté utilisation (35). Le circuit de transfert de chaleur (30) réalise sélectivement une opération normale qui fournit seulement le milieu de chaleur chauffé par l'échangeur de chaleur côté source de chaleur (23) à l'échangeur de chaleur côté utilisation (35), une opération de stockage de chaleur qui fournit le milieu de chaleur chauffé par l'échangeur de chaleur côté source de chaleur (23) à la fois à l'échangeur de chaleur côté utilisation (35) et au réservoir de stockage de chaleur (37), et une opération d'utilisation qui fournit à la fois le milieu de chaleur chauffé par l'échangeur de chaleur côté source de chaleur (23) et le milieu de chaleur dans le réservoir de stockage de chaleur (37) à l'échangeur de chaleur côté utilisation (35).
PCT/JP2009/002210 2008-05-21 2009-05-19 Système de chauffage Ceased WO2009142004A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-133411 2008-05-21
JP2008133411A JP2009281650A (ja) 2008-05-21 2008-05-21 暖房システム

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WO2009142004A1 true WO2009142004A1 (fr) 2009-11-26

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120280052A1 (en) * 2010-03-05 2012-11-08 Mitsubishi Heavy Industries, Ltd. Hot-water heat pump and method of controlling the same
EP2489946A3 (fr) * 2011-02-16 2014-07-16 Panasonic Corporation Appareil d'alimentation d'eau chaude/froide
WO2015055203A1 (fr) * 2013-10-14 2015-04-23 Grundfos Holding A/S Commande d'une pompe pour optimiser un transfert de chaleur
CN106409111A (zh) * 2016-09-29 2017-02-15 浙江大学滨海产业技术研究院 供水系统压力调控模型及其使用方法
CN106530929A (zh) * 2016-09-29 2017-03-22 浙江大学滨海产业技术研究院 供水系统流量调控模型及其使用方法
EP3091293A4 (fr) * 2013-12-20 2017-11-08 Daikin Industries, Ltd. Dispositif de chauffage
WO2018116410A1 (fr) * 2016-12-21 2018-06-28 三菱電機株式会社 Climatiseur
EP3789691A4 (fr) * 2018-05-04 2021-06-23 Kyungdong Navien Co., Ltd. Chaudière
WO2022076649A1 (fr) 2020-10-07 2022-04-14 Emerson Climate Technologies, Inc. Système de régulation de climat et procédé de commande du système

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6237452B2 (ja) * 2014-05-08 2017-11-29 三菱電機株式会社 給湯機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60196559A (ja) * 1984-03-19 1985-10-05 三菱商事株式会社 コンピユ−タ室空調装置
JP2002031377A (ja) * 2000-07-21 2002-01-31 Mitsubishi Estate Co Ltd 冷顕熱利用による氷蓄熱方法及び氷蓄熱装置
JP2004218909A (ja) * 2003-01-14 2004-08-05 Matsushita Electric Ind Co Ltd 給湯機
JP2006046801A (ja) * 2004-08-04 2006-02-16 Corona Corp 貯湯式暖房装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60196559A (ja) * 1984-03-19 1985-10-05 三菱商事株式会社 コンピユ−タ室空調装置
JP2002031377A (ja) * 2000-07-21 2002-01-31 Mitsubishi Estate Co Ltd 冷顕熱利用による氷蓄熱方法及び氷蓄熱装置
JP2004218909A (ja) * 2003-01-14 2004-08-05 Matsushita Electric Ind Co Ltd 給湯機
JP2006046801A (ja) * 2004-08-04 2006-02-16 Corona Corp 貯湯式暖房装置

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120280052A1 (en) * 2010-03-05 2012-11-08 Mitsubishi Heavy Industries, Ltd. Hot-water heat pump and method of controlling the same
US9664415B2 (en) * 2010-03-05 2017-05-30 Mitsubishi Heavy Industries, Ltd. Hot-water heat pump and method of controlling the same
EP2489946A3 (fr) * 2011-02-16 2014-07-16 Panasonic Corporation Appareil d'alimentation d'eau chaude/froide
CN105829804B (zh) * 2013-10-14 2019-03-26 格兰富控股联合股份公司 优化热量传递的泵的控制
WO2015055203A1 (fr) * 2013-10-14 2015-04-23 Grundfos Holding A/S Commande d'une pompe pour optimiser un transfert de chaleur
CN105829804A (zh) * 2013-10-14 2016-08-03 格兰富控股联合股份公司 优化热量传递的泵的控制
US10527294B2 (en) 2013-10-14 2020-01-07 Grundfos Holding A/S Control of a pump to optimize heat transfer
EP3091293A4 (fr) * 2013-12-20 2017-11-08 Daikin Industries, Ltd. Dispositif de chauffage
CN106409111A (zh) * 2016-09-29 2017-02-15 浙江大学滨海产业技术研究院 供水系统压力调控模型及其使用方法
CN106530929A (zh) * 2016-09-29 2017-03-22 浙江大学滨海产业技术研究院 供水系统流量调控模型及其使用方法
JPWO2018116410A1 (ja) * 2016-12-21 2019-02-28 三菱電機株式会社 空気調和装置
WO2018116410A1 (fr) * 2016-12-21 2018-06-28 三菱電機株式会社 Climatiseur
CN110073151A (zh) * 2016-12-21 2019-07-30 三菱电机株式会社 空气调节装置
EP3789691A4 (fr) * 2018-05-04 2021-06-23 Kyungdong Navien Co., Ltd. Chaudière
WO2022076649A1 (fr) 2020-10-07 2022-04-14 Emerson Climate Technologies, Inc. Système de régulation de climat et procédé de commande du système
EP4226101A4 (fr) * 2020-10-07 2024-10-23 Copeland LP Système de régulation de climat et procédé de commande du système

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